This adds a `SendRequestExt` trait to h2-support, with a `get` method that does a lot of the repeated request building stuff many test cases were doing. As a first step, the cleans up stream_states tests to use it.
This adds a `SendRequestExt` trait to h2-support, with a `get` method that does a lot of the repeated request building stuff many test cases were doing. As a first step, the cleans up stream_states tests to use it.